component
STR485LVQT
Public Made by Adomby adom
STMicroelectronics RS-485 / RS-422 ICs, DFN-10(3x3). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSTR485LVQT
STMicroelectronics · RS-485 / RS-422 ICs · DFN-10(3x3)
STR485LVQT from STMicroelectronics, in a DFN-10(3x3). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VL | power_in | Logic supply for the logic I/O signals, specified from 1.65 V to 3.6 V, and must always be less than or equal to VCC. |
| 2 | R | output | Receiver data output, which goes to a guaranteed high state when the bus is open, shorted or idle (fail-safe), with output current limited to -12 mA to 12 mA absolute maximum. |
| 3 | DE | input | Driver enable input: high enables the driver outputs A and B, while low or open disables them (high impedance), with input levels referenced to VL (VIH min 0.7×VL, VIL max 0.3×VL) and an internal 2.5 MΩ pull-down to GND through 150 Ω. |
| 4 | nRE | input | Receiver enable input, active low: low enables receiver output R, high or open disables it (high impedance), with an internal 2.5 MΩ pull-up to VCC through 150 Ω. |
| 5 | D | input | Transmission data input that sets the driven bus state when the driver is enabled, with input levels referenced to VL (VIH min 0.7×VL, VIL max 0.3×VL). |
| 6 | GND | power_in | Network ground reference; all voltages except the differential voltage are referenced to this terminal. |
| 7 | SLR | input | Slew rate select: low (GND or open) selects 20 Mbps, high (VL) selects 250 kbps, and it defaults to 20 Mbps if left floating although floating is not recommended. |
| 8 | A | bidirectional | Digital bus I/O line A; operating input range is -7 V to 12 V with absolute maximum range of -13 V to 13 V. |
| 9 | B | bidirectional | Digital bus I/O line B, driven opposite to A per the driver truth table; operating input range is -7 V to 12 V with absolute maximum range of -13 V to 13 V. |
| 10 | VCC | power_in | Bus supply for the A and B bus lines, specified from 3 V to 3.6 V (absolute maximum 4.8 V), and must be greater than or equal to VL. |
| 11 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DFN-10(3x3) |
| Category | Interface |
| Pins | 11 |
CAD (KiCad official)
- Symbol:
STR485LVQT - Footprint:
Package_DFN_QFN:DFN-10-1EP_3x3mm_P0.5mm_EP1.55x2.48mm - 3D model: DFN-10(3x3) (KiCad packages3D, STEP)
- 3D model files:
str485lvqt-etched.step/str485lvqt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);str485lvqt.step/str485lvqt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (26 pp, sha256
9e2afeea0702652c, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).